If you honestly think Oda will dedicate enough time to Lucci vs. Zoro for Lucci to have "one or two powerful moves in store," I think you are going to be pretty disappointed, not going to lie. I think that whenever Jinbei shows up, Zoro will do some named attack against Lucci, who might try to counter with an upgraded version of his Rokuogan only to be overpowered, and that's going to be it.
The best Lucci can hope for is that Zoro uses Lions Song but he upgrades it via KoH and names it Leopards song or something like that before he gets one shot. Oda didnt havbe Zoro pretty much say "I am the one who dictates how long this fight lasts" only for the fight to last much longer.